Attachment to the barrels of firearms.



N0. 832,695. PATENTED 00319, 1906.

J. l 'NYGAARIL ATTACHMENT T0 THE BARREL?) F FIRBARMS.

APPLIUATION FILED SBPT.1.1905.

iii/'d all' whom/it 'may concern:

` ivo.v seace.

FFE STATES.

`JOVIPIALA OiaSEN NYGAARD, OF QHRISTIANIA., l,

` ArTACHMENT To THE B'ARHELS oF Inf-usimme.A p'

Be it known that I, JOHAN OLsnN NY- -AARD; a subject of'1 the King of Sweden and Norway, residingat the city of Christiania,

inthe Kingdom oii-Svf'eden and Norway, have inventeda new and useful Attachment to the 1 ingr the report accompanying the firing of a Barrels of Firearms', of which the following is a full, clear, and exact description.

The invention relates to improvements in ordnance, and has for its object the provision of an lmproved mufiiing device for deadencharge; and the invention also has for its objjtect the arrangement of such a device whereyismoke and gases accompanying the disfcharge oi the weapon are prevented from issuing'rom. the muzzle with and subsequent l `to the passage of the projectile. l" According to my invention there is provided mechanical instrumentalities adapted to be actedju on bythe gases accompanying the firing o acharge in a manner to temporarily cclosethe bore of the gun to the outwardlytraveling gases, and thereby muiiie the re' port of the charge.

To this end the invention consists in roviding the barrel with late@ .11,1 v'ffive-cham ers located adjacent the muzzle and communicat' vin with the bore by suitably-disposed clos ab e orts and in the`provision within the 1 ucham ers of valves adapted when seated to `4 close the bore, said valve-chambers commueating with the bore by means of channels adapted. to admit the gases in a manner to close-sa1d valves, the latter being normally held 1n an open position. In combination j withthe above there may be provided on stationary ordnance a smoke or as chamber V ada ted to form a receiver for t e gases and smo e and connected with an outlet ot' the muffler. y

In the drawings, Figure l is a longitudinal horizontal section of a gun, showing the device of my invention ap lied thereto. Fig. 2 is a side elevation of t e muzzle end of the y barrel, showing the improved smoke and gas tional view Von line 4 4 o l.

chamber lin section. Fi 3 is a vertical sec- Fig. 4 is a Y vertical fragmentary end section of the muzzle endlof the barrel, showing the valves in Specification of Letters Patent. V Application led September 1, 1905- Serial No. 276.741.

closed position. Fig. 5 is a detail of one of the valves. F'U. 6 is a sectional view of the valve shown inlF'g. 5. Figs. 7 and S are side and end views of a structural detail.

Like parts are designated by similar characters of reference throughout the different iigures of the drawings.

A designates the barrel of the gun, rovided with the usual bore. The exterior o the barrel is reduced froml the muzzle inwardly a suitable distance and is provided with exterior screw-threads.

B designates a sleeve internally threaded and adapted to fit on the threaded outer end -ot the barrel and preferably extending throughout the length of the threaded portion thereof. Said sleeve B is rovided adj acent the muzzle with laterallyis osed cham`- bers C, which communicate wit the barrel by orts c. The chambers C are provided with) oppositely-facing converging surfaces K, adapted to'form valve-seats, which surfaces register with and are continued by 1nclined faces c', formed in the barrel of the gun, the latter surfaces conver ing to a line c, 1ntersecting the axis of the ore. Said valveseats extend inwardly'from the .upper and lower Walls of the chambers a sutiiclent distance to form an effective contact-surface and are centrally recessed at j.

Valves D are provided which consist of ."7 at lates of a width substantially equal to Le height of the chambers C and have an operative t therein. Said valves are provided with trunnions d, adapted to seat in recesses l), formed in the outer end of the sleeve B. Said valves D are chamfered at their inner ends, as shown at d', at which point said valves engage each other when closed, the cha'mfered surface being of suiicient are-ato form an effective contact-surface. In order to maintain the valves normally in an open position, springs J are provided and, as shown,` are seated in the recesses j and anchored therein to the sleeve B, the free ends of said springs engagin the inner faces of the valves D and norma ly holding the same in the position shown in Fig. 1.

In order to render the valve-chambers readily,L accessible and in order to enable the 4s m2 'a-tma to accommodate the projectile.

desired manner.

smoke-chamber M.

valves D to be quickly replaced incase of inl dovetailed lit with the over anging margins of said openings b.' l

I preferably connecttthe plates G byan end piecey F, the latter -being preferably greater in width than the valves D and their,

trunnions and adapted to cover the recesses b and hold the trunnions in place therein and likewise to close the outer'ends of the valvechannbers- C. The end piece F is centrally apertured at f to accommodate the outer muzzle end'of the barrel. When the valves Dare inserted place', the connecting end pieceF and pla-te G are inserted in place end- Wise of the vsleeve B, the plates G=closing the openings b" and the end piece F closing the outer-:end of the sleeve B and surrounding the barrel IA, as clearly shown in Fig. 1'; `A nut H serves to securely hold tle parts in an assembled position.

The sleeve-B is provided with passages E, which comunicate at e Wit-l1 the bore at one end and with the chain-bers C at their op osite ends and -preferabl at the outer latera portions o fsaid cham rs and at a point laterallybeyond the normal position of the valves D, as clearly shown in F1g. 1. TheV borel is ovid'ed with an outlet Opfor thegases Whic may communicate with the outer air orwith any suitable form of receiver. Asslrofwn and in cases where the in' venfton is 'applied ,to heavy ordnance the outlet rconrlnunr'icates b l-a b -pass P'With va .aid c a'mberltly consists o'f acasing provided with 'a -flange m',

adapted te fit-over the outer end of the sleeve- B .and :to be secured inplace thereto in any l Thechamber M is provi ded with -a partition' N-and with an end Wall m2. The partition N isapertured at n and the Wall- Theoperationgwill be obvious from the fere'gnlng,1butmay be briefly described as follows: the charge is iired, the' accompanying gases afterlthe projectile has passed tlepoint designated' by e; pass through thepassagesfE an engage the outer faces o'the valves 'l1 ByA reason .of thefact .that the vaivesi) substantially fill the valve-chambers the pressureoi the incoming gases forces the valves `down upon theirseats,v serving to close the bore and prevent the' gases issuing from' the muzzle. his action serves effectivelyto Inutile the usual-report accompanying the 'iiringofa charge. 'The remaining gases are free to passout through th'e openinglxfnto "thechamber-'M or into any other suitable'- receiver: The gases accompanyingthe projectile and passing out therewith be-l fore the valves D are closed are practically all retained `in the smoke-chamber M, 'there being no draft to carry ofi -the contents of said chamber.

It Will be obvious lthatthe smoke-chamber Mis not an essentialfeature of the invention and that it will be used only in connection with heavy ordnance.

It 'll be further understood that all of the advantages of the invention may be realized by Ithe em loyment of my improved muiilin devicen ependent of the chamber M, as the latter performs no function in muling the re ort of the r'ed charge.'

claim- 1. An attachment to the barrel of rearms consisting of a piece securely iixed to the muzzle of the gun and com risin two chambers-located one on each si e of t e boreand containin two; clacks, which are held in open position y sprin s and in closed position meet in the center ine of the bore, said chambers on the one side of the said clacks com'- municating with 'the front end of the bore or with an Vextension of the same, and on the other side of the clacks the said chambers communicate with channels branching off from the bore at a point located ata suitable distance from the closing-point of the said clacks, substantially as shown and for the sleeve secured-to the larrel, valve-chambers formed in said sleeveand communicating with=the bore by ports, said chambers also communicating with the bore by passages, and al plurality of valves located in said chambers and serving, whenacted upon by the discharging ases, to close said bore.4

3. A mu er for ordnance com rising in IOO combination, a barrel provided wit a bore, a

sleeve secured to the barrel, chambers formed in said sleeveand communicating Withsaid bore by ports, said chambers alsofcommunieating with said bore by passages, and springactuatedv valves located in said chambers IbetWeen'- the terminals of said passages and ports and serving to close said bore when acted upon byl the"dischargi3ng gases.

4. A muffler for-v ordnance comprising in combination, a' barrel provided with -a bore, .two lvalve-chambers communicating with .said bore, saidchambers also communicating with saidb'ore by passages, and valves-lo'- cated in said chambers and-servi'ng-.to close said bore when acted upon'by-'discharging gases.

` 5. A muffler for ordnance com' rising-infl combination, a barrel provided wit "a bore-,a sleeve secured to the muzzle end' of thebarrel,

chambers formed in said sleevesand commw.

nicating with said bore by ports, said chamdischarge of the projectile, and e by-pass bers also communicating VWith said bore by. leading from said bore to said chamber. w

v passages, spring-actuated Valves located in In testimony whereof I affix my signature said chambers between the terminals of said in presence of two Witnesses.

5 passages and ports and serving to close said JOHAN OLSEN NYGAARD.

` bore when vacted upon by the discharging Witnesses:

gases, a smoke-chamber divided into tWo N.G. FAUDBERG,

compartments and having apertures for the HENRY BORDEWIGH. 

